Read Sharp ER-A410 / ER-A420 (serv.man5) Service Manual online
ER-A410/ER-A420
HARDWARE DESCRIPTION
– 8 –
3. CPU PIN TABLE
M16C/24 PORT MEMORY SPACE: NORMAL MODE
PROCESSOR MODE: MICRO PROCESSOR MODE
It is used by (SEPARATE BUS 8bit width).
PORT
PIN
No.
I/O
Pin
name
Signal
name
Initial
value
value
OFF
MODE
Function
P00
88 I/O
D0
D0
Out L
P01
87 I/O
D1
D1
Out L
P02
86 I/O
D2
D2
Out L
P03
85 I/O
D3
D3
Out L
P04
84 I/O
D4
D4
Out L
P05
83 I/O
D5
D5
Out L
P06
82 I/O
D6
D6
Out L
P07
81 I/O
D7
D7
Out L
P10
80
O
P10
RAS
L
Out L
RECEIPT
PAPER FEED A
PAPER FEED A
P11
79
O
P11
RBS
L
Out L
RECEIPT
PAPER FEED B
PAPER FEED B
P12
78
O
P12
RCS
L
Out L
RECEIPT
PAPER FEED C
PAPER FEED C
P13
77
O
P13
RDS
L
Out L
RECEIPT
PAPER FEED D
PAPER FEED D
P14
76
O
P14
JAS
L
Out L
JOURNAL
PAPER FEED A
PAPER FEED A
P15
75
O
P15
JBS
L
Out L
JOURNAL
PAPER FEED B
PAPER FEED B
P16
74
O
P16
JCS
L
Out L
JOURNAL
PAPER FEED C
PAPER FEED C
P17
73
O
P17
JDS
L
Out L
JOURNAL
PAPER FEED D
PAPER FEED D
P20
72
O
A0
A0
Out L
P21
71
O
A1
A1
Out L
P22
70
O
A2
A2
Out L
P23
69
O
A3
A3
Out L
P24
68
O
A4
A4
Out L
P25
67
O
A5
A5
Out L
P26
66
O
A6
A6
Out L
P27
65
O
A7
A7
Out L
P30
63
O
A8
A8
Out L
P31
61
O
A9
A9
Out L
P32
60
O
A10
A10
Out L
P33
59
O
A11
A11
Out L
P34
58
O
A12
A12
Out L
P35
57
O
A13
A13
Out L
P36
56
O
A14
A14
Out L
P37
55
O
A15
A15
Out L
P40
54
O
A16
A16
Out L
P41
53
O
A17
A17
Out L
P42
52
O
A18
A18
Out L
P43
51
O
A19
A19
Out L
P44
50
O
/CS0
/CS0
Out L
P45
49
O
/CS1
/CS1
Out H
P46
48
O
/CS2
/CS2
Out H
P47
47
O
/CS3
/CS3
Out L
P50
46
O
/WR
/WR
Out L
P51
45
O
/BHE
(NU)
Out L
P52
44
O
/RD
/RD
Out L
P53
43
O
BCLK
BCLK
Out L
P54
42
O
/HLDA
(NU)
Out L
P55
41
I
/HOLD
/HOLD
In
P56
40
O
ALE
(NU)
Out L
P57
39
I
/RDY
/RDY
In
P60
38
O
/RTS0
/RS2
H
In
RS-232 /RS2
P61
37
O
CLK0 DRAWER1
L
Out L
DRAWER 1
DRIVE SIGNAL
DRIVE SIGNAL
P62
36
I
RXD0
RD2
In
RS-232 RD2
P63
35
O
TXD0
SD2
H
In
RS-232 SD2
P64
34
O
/RTS1
/RS1
H
In
RS-232 /RS1
P65
33
O
P65
/EFTRES
H
Out L
EFT RESET
SIGNAL
SIGNAL
P66
32
I
RXD1
RD1
In
RS-232 RD1
P67
31
O
TXD1
SD1
H
In
RS-232 SD1
P70
30
O
TXD2
SO
L
Out L
PRINTER DATA
OUT
OUT
P71
29
I
RXD2
SI
In
PRINTER DATA
IN
IN
P72
28
O
CLK2
PCLK
L
Out L
PRINTER
CLOCK
CLOCK
P73
27
O
P73
DRAWER2
L
Out L
DRAWER 2
DRIVE SIGNAL
DRIVE SIGNAL
P74
26
O
P74
/ER1
H
In
RS-232 /ER1
P75
25
I
P75
/CD1
In
RS-232 /CD1
P76
24
I
P76
/CS1
In
RS-232 /CS1
P77
23
I
P77
/DR1
In
RS-232 /DR1
P80
22
O
P80
BUZZER
L
Out L
P81
21
O
P81
VHCOM
L
In
PRINTER HEAD
CONTROL
CONTROL
P82
20
I
/NIT0
POFF
In
P83
19
I
P83
/EFTC
In
EFT PWB connect
P84
18
O
P84
/ER2
H
In
RS-232 /ER2
P85
17
I
/NMI
/NMI (NU)
In
P86
11
O XCOUT
XCOUT
32.768kHz
P87
10
I
XCIN
XCIN
32.768kHz
P90
7
I
P90
MODE
In
MODE KEY
SENSE
SENSE
P91
6
I
P91
MSENS
In
MISCELLA-
NEOUS SENSE
NEOUS SENSE
P92
5
O
P92
BA1
L
Out L
BANK 1 SIGNAL
P93
4
O
P93
BA0
L
Out L
BANK 0 SIGNAL
P94
3
O
P94
DATA/CE
L
Out L
LCD DATA
LATCH SIGNAL
LATCH SIGNAL
P95
2
O
P95
BLON
L
Out L
BACK LIGHT ON
PORT
PIN
No.
I/O
Pin
name
Signal
name
Initial
value
value
OFF
MODE
Function
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